243893688 has 32 divisors (see below), whose sum is σ = 612178560. Its totient is φ = 80972000.

The previous prime is 243893681. The next prime is 243893711. The reversal of 243893688 is 886398342.

It is a self number, because there is not a number n which added to its sum of digits gives 243893688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243893681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14220 + ... + 26267.

It is an arithmetic number, because the mean of its divisors is an integer number (19130580).

Almost surely, 2^243893688 is an apocalyptic number.

It is an amenable number.

243893688 is an abundant number, since it is smaller than the sum of its proper divisors (368284872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243893688 is a wasteful number, since it uses less digits than its factorization.

243893688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40747 (or 40743 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The square root of 243893688 is about 15617.0960168656. The cubic root of 243893688 is about 624.7892093423.

The spelling of 243893688 in words is "two hundred forty-three million, eight hundred ninety-three thousand, six hundred eighty-eight".